Toshiba NP-100 Replacement Battery 3.7V 1850mAh Li-ion

Toshiba PDR-M3 — 3.7V Li-ion Replacement Battery (NP-100)

This is a 3.7V, 1850mAh Li-ion replacement for the Toshiba NP-100 battery. It fits the PDR-M3 compact digital camera. Dimensions are 70.70 × 19.75 × 20.35mm — same form factor as the original cell.

• PDR-M3 platform fit: The PDR-M3 draws power across the imaging sensor, LCD, and onboard processing from a single 3.7V cell. The NP-100 form factor and contact layout are fixed — this replacement matches both so the battery compartment closes and makes full contact.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a 3.7V Li-ion test rig. The BMS held cutoff at the correct low-voltage threshold and accepted charge without triggering protection lockout.
• First-cycle initialisation on the PDR-M3: Run one full charge cycle through the camera body or OEM charger before heavy shooting. Some camera BMS systems map the battery-remaining display to a learned discharge curve — skipping this step can cause the indicator to read inaccurate percentages from the start.

Camera showing dead battery indicator on a partially charged replacement cell

The PDR-M3 maps its battery indicator to voltage thresholds calibrated against the original NP-100 discharge curve. A new third-party cell can present a slightly different open-circuit voltage at rest, which the camera reads as critically low even when capacity is present. This usually resolves after one full charge-to-discharge cycle inside the camera body. If the indicator still reads empty after a full cycle, check that the cell resting voltage is at or above 3.6V with a multimeter before assuming a fault.

Battery percentage jumping erratically during shooting

Erratic percentage readings on the PDR-M3 happen when the camera's fuel gauge hasn't mapped its thresholds to the new cell's discharge curve. The indicator can jump from 60% to 20% mid-session or spike back up when the camera idles. This isn't a faulty cell — it's the BMS recalibrating across the first few cycles. Run two full charge and discharge cycles and the readings will stabilise as the camera learns the cell's actual voltage-to-capacity relationship.